Best Sustainability Tech Companies in Houston, United States
The 135 best Sustainability Tech companies in Houston, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Solugen.
Our analysis of 84 Sustainability Tech companies
$19.4b in tracked funding; 85% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Sustainability Tech companies in Houston
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | Solugen 🦄 Developer of industrial solutions for oil and gas, fuels, and defense | $637M | 43 mo ago | 99 | Sean Hunt Co-Founder & CTO | WordPressMySQLPHP+26 | 210 patents Patents concentrated in chemistry & materials | — |
| 2 | AlloVir Developer of T-cell therapies to treat infectious diseases | $151M | 85 mo ago | 97 | David Hallal Co-Founder | — | 8 patents Ex vivo expansion of multivirus-specific T cells for transplant infection prophylaxis | — |
| 3 | VoltaGrid AI and cloud-driven platform offering microgrids to provide electricity to off-grid areas 74Funding top 18%News top 20%Growth top 25%Moat top 28% All 12 signals ▾Fundingtop 18% Newstop 20% Growthtop 25% Moattop 28% Partnerstop 29% Innovationtop 32% Patentstop 33% Techtop 44% AItop 45% Talentbottom 49% Marketbottom 46% Globalbottom 39% Funding: Raised $100M across 4 rounds · 4 rounds over 5 yrs (0.8/yr) News: 8 BI events in 12 mo (of 17 tracked, 4 types) · +167% YoY rank vs industry peers · Fliar Intelligence Index 74/100 | $100M | 1 mo ago | 44 | Nathan Ough Co-Founder & CEO | WordPressApple iCloud MailMicrosoft 365+21 | 38 patents Grid‑scale power generation, condenser‑based stabilization, and modular energy‑system hardware | 2 internships |
| 4 | Utility Global Provider of solutions to convert waste gas into hydrogen and syngas 72Growth top 15%Patents top 16%Innovation top 19%Funding top 19% All 10 signals ▾Growthtop 15% Patentstop 16% Innovationtop 19% Fundingtop 19% Newstop 22% Moattop 29% Talenttop 38% Globalbottom 42% Partnersbottom 35% Marketbottom 27% Growth: Fresh capital in last 24 mo Patents: 222 patents matched (strict assignee match) · 150 filings since 2022 vs 65 in 2017-21 rank vs industry peers · Fliar Intelligence Index 72/100 | $86M | 4 mo ago | 4 | Matt Dawson Founder & Special Advisor | — | 222 patents Electrochemical production of hydrogen and syngas from ammonia and carbon-containing feedstocks | — |
| 5 | TAS Provider of cooling and power equipment for the data center | $60M | 136 mo ago | 201 | — | WordPressApple iCloud MailMySQL+18 | — | 4 job openings · 1 internship |
| 6 | Applied Carbon Developer of mobile biochar production technology 22Funding top 33%Talent top 38%Global bottom 39%Tech bottom 36% All 6 signals ▾Fundingtop 33% Talenttop 38% Globalbottom 39% Techbottom 36% Marketbottom 25% Newsbottom 18% Funding: Raised $41.6M across 4 rounds · 4 rounds over 6 yrs (0.7/yr) Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 22/100 | $42M | 22 mo ago | — | Jason Aramburu Co-Founder & CEO | WebflowWorkableSlick+7 | — | — |
| 7 | SmartAC.com Provider of a platform for HVAC membership program management and growth 48Funding top 32%Partners top 32%Tech top 34%Growth top 35% All 11 signals ▾Fundingtop 32% Partnerstop 32% Techtop 34% Growthtop 35% Moattop 39% Producttop 40% Customerstop 49% Talentbottom 49% Newsbottom 39% Marketbottom 32% Globalbottom 29% Funding: Raised $38.6M across 6 rounds · 6 rounds over 6 yrs (1.0/yr) Partners: 2 partnership announcements in 12 mo (2 in 24 mo) rank vs industry peers · Fliar Intelligence Index 48/100 | $39M | 2 mo ago | 34 | Josh Teekell Founder & CEO | Cart FunctionalitySentryNode.js+23 | — | — |
| 8 | Enchanted Rock Clean onsite power generation for commercial, industrial, and data center resilience | $37M | 95 mo ago | 256 | Thomas McAndrew Founder and CEO | WordPressApple iCloud MailMicrosoft 365+24 | — | 1 job opening |
| 9 | 1PointFive Developer of direct air capture technology and geologic sequestration projects | $36M | 20 mo ago | 17 | Jeff Green Founder | Craft CMSPHPYii+22 | — | — |
| 10 | BladeLogic Data center automation solutions | $32M | 249 mo ago | 47 | — | — | 73 patents Enterprise automation for virtualized app deployment, lifecycle management, and secure network monitoring | — |
| 11 | Quidnet Energy Provider of pumped hydro based energy storage system | $29M | 16 mo ago | 8 | Joe Zhou CEO | WordPressMySQLPHP+19 | 75 patents Underground hydraulic fracturing for fluid energy storage and geothermal power generation | 1 expansion |
| 12 | Innowatts AI & SaaS-driven energy-saving electricity products for homeowners | $24M | 85 mo ago | 15 15 → 24 (+60%) | — | — | — | — |
| 13 | Viking Cold Solutions Provider of thermal energy storage systems for cold storage applications | $17M | 91 mo ago | 14 14 → 14 (+0%) | Paul Robbins Founder & Chairman | WordPressMySQLPHP+25 | 27 patents Cold-chain logistics: thermal energy storage systems and insulated packaging solutions. | — |
| 14 | Branch Energy Utility providing electricity from renewable sources | $15M | 22 mo ago | 17 | — | SalesforceClerkReact Router+17 | — | — |
| 15 | Cemvita Developer of engineered microbes for converting waste into valuable resources | $15M | 47 mo ago | 80 | Tara Karimi Cofounder and Chief Technology Officer (CTO) | WordPressMySQLPHP+20 | — | — |
| 16 | Asylia Therapeutics Developer of medicines for cancer, autoimmune, and infectious diseases | $14M | 14 mo ago | 4 | Richard Jones Co-Founder | — | — | — |
| 17 | MI Systems Water treatment solutions | $14M | 86 mo ago | 37 | Grant Page Founder | — | 1,296 patents High‑resolution hydrogel/photopolymer 3D printing with multi‑plane stereolithography systems | — |
| 18 | Synthesis Energy Systems Online sports betting and casino platform with diverse gaming options | $13M | 103 mo ago | 22 | — | — | — | — |
| 19 | Envana Provider of cloud platform for enterprise-wide carbon and methane emissions management | $13M | 12 mo ago | 6 | — | — | — | 1 partnership |
| 20 | Memgen Developer of immunotherapies to treat cancer | $12M | 18 mo ago | 9 | — | — | 72 patents Oncolytic virus and CD40/TLR‑based immunotherapy platforms for cancer and vaccines | — |
| 21 | Element Markets Provider of solutions for carbon and emission credits | $12M | 61 mo ago | — | Randall Lack Co-Founder | — | — | — |
| 22 | REEcycle Recycling rare earth elements from electronic waste for a sustainable future | $11M | 16 mo ago | 7 | Casey McNeil Co-Founder & CEO | Squarespace CommerceCart FunctionalitySquarespace+20 | — | — |
| 23 | ACE Green Recycling Provider of sustainable battery recycling technologies and solutions | $10M | 52 mo ago | 70 | Nishchay Chadha Chief Executive Officer | WordPressMySQLPHP+20 | — | 4 job openings |
| 24 | Revterra Developer of flywheel energy storage systems for grid applications | $6M | 30 mo ago | 6 | Ben Jawdat Founder & CEO | WebflowCloudflare TurnstilereCAPTCHA+12 | 18 patents High‑speed flywheel energy storage and bearing systems for rapid EV charging | — |
| 25 | Bacterial Barcodes Provides solutions to track hospital-acquired infections (HAI) and for environmental control for product… | $6M | 280 mo ago | — | Mimy Healy Ex-CEO and President | — | 4 patents Rapid bacterial detection using repetitive DNA primers and transcription‑based nucleic acid amplification | — |
| 26 | Helix Earth Technologies Provider of energy efficient HVAC systems 29Funding top 37%Talent top 38%Moat top 48%Tech bottom 42% All 6 signals ▾Fundingtop 37% Talenttop 38% Moattop 48% Techbottom 42% Globalbottom 37% Marketbottom 32% Funding: Raised $5.9M across 3 rounds · 3 rounds over 2 yrs (1.5/yr) Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 29/100 | $6M | 2 mo ago | — | Brad Husick Co-Founder & CBO | Tailwind CSSGSAPVercel+7 | — | 7 job openings |
| 27 | Luna Genetics Developer of a non-invasive pre-natal diagnostic test | $4M | 54 mo ago | 15 | Philip Reilly Co-Founder | — | — | — |
| 28 | Pellucere Technologies Provider of materials that can be used as a coating on solar PV modules | $4M | 63 mo ago | 8 | Chih-hung Chang Founder | WordPress Block EditorElementorWordPress+21 | — | — |
| 29 | Inovues Provider of non-intrusive glazing retrofit systems | $4M | 43 mo ago | 11 | Anas Kassas Founder & CEO | — | 22 patents Retrofit breathable window glazing systems for building energy efficiency and ventilation. | — |
| 30 | WASTELINQ Cloud-based ERP software and solutions for bulk waste generators | $3M | 18 mo ago | 37 | Kenneth Odom Chief Executive Officer | HubSpot CMS HubReactstyled-components+14 | — | 1 launch |
| 31 | Mistbox Provider of energy-efficient retrofit for AC | $2M | 81 mo ago | — | Andrew Parks Co-Founder & COO | — | 13 patents Misting systems for HVAC cooling and automated leak‑shutoff valve technology. | — |
| 32 | mistbox Mistbox dramatically boosts the efficiency of air-conditioning units and saves users 30% on their cooling… | $2M | 81 mo ago | 3 | — | — | 13 patents Misting and leak‑shutoff technologies for HVAC and water‑based cooling systems | — |
| 33 | Planckton Data Online platform offering carbon monitoring solutions | $2M | 38 mo ago | 5 | Sandeep Roy Co-Founder | — | — | — |
| 34 | Smart OES Provider of building energy management solutions for commercial spaces | $1M | 101 mo ago | — | Bryan Hassin Co-Founder & CEO | — | — | — |
| 35 | EnergyFunders Crowdfunding platform for oil and gas projects | $1M | 85 mo ago | 10 | — | Node.jsReactstyled-components+21 | — | — |
| 36 | Water Lens Real-time water testing solutions for diverse industries, ensuring better data | $1M | 85 mo ago | 9 | Keith Cole CEO | Squarespace CommerceSquarespaceApple iCloud Mail+12 | 39 patents Chemical analysis kits for measuring water quality parameters such as borate, hardness, alkalinity, and phosphate. | — |
| 37 | SolMem Technology solution for waste and water treatment | $1M | 45 mo ago | 5 | Roxy Evans Co-Founder | — | 3 patents Spiral-wound multi-effect membrane distillation modules for efficient water desalination | — |
| 38 | Seldon Energy Software suite for pump jack control and water well management | $656K | 164 mo ago | 4 | Gary W Luce CEO | — | — | — |
| 39 | RecycleMatch Solution for connecting waste generators with recyclers | $640K | 188 mo ago | — | Brooke Farrell Co-Founder & CEO | — | — | — |
| 40 | SafePass Blockchain-based visitor management system | $619K | 88 mo ago | 1 | Ron H Managing Director | — | 15 patents Secure employee identification badge hardware and software systems | — |
| 41 | Lillianah Technologies Online platform offering carbon offset solutions | $525K | 31 mo ago | 2 | Benjamin Slotnick Founder & CEO | — | — | — |
| 42 | Wagonway Provider of LED lighting solution | $500K | 26 mo ago | — | Chimaobi Onwuchekwa Co-Founder | WordPressMySQLPHP+28 | — | — |
| 43 | Algae Farm Developer of algae-based biomass production solutions | $431K | 168 mo ago | — | Rick Berman Founder & CEO | — | — | — |
| 44 | Keto AI enabled solar-charging skimmer solutions provider | $360K | 78 mo ago | 7 | Jeff Jensen CEO and Cofounder | — | 6 patents Automated pool water management and monitoring systems for skimming, level, and pressure control. | — |
| 45 | NXTClean Fuels Oil production from recycled organic materials | $210K | 5 mo ago | 5 | Christopher Efird Founder & CEO | WordPressMySQLPHP+21 | — | 1 partnership · 1 expansion |
Top 12 Sustainability Tech companies in Houston
#1
Series D · Houston, Texas · founded 2020 · 44 employees$100Mraised▾
AI and cloud-driven platform offering microgrids to provide electricity to off-grid areas. It offers solutions that include trailer-mounted custom-engineered switchgear, trailer-mounted Genset, and trailer-mounted energy storage system. The AI-driven platform allows users to track emissions, costs, power usage, equipment diagnostics, equipment operation, and more.
- May 2026Series D$775M
- Nov 2025Conventional Debt$5B
- Jul 2022Conventional Debt$60M
- Dec 2021Series C$100M
#2
Series D · Houston, Texas · founded 2018 · 4 employees$86Mraised▾
Provider of solutions to convert waste gas into hydrogen and syngas. The eXERO technology platform combines electrochemical and chemical processes, delivering hydrogen and syngas with low carbon intensity. The platform removes the need for external electricity.
- Feb 2026Series D$100M
- May 2024Series C$53M
- May 2022Series B$25M
- Feb 2021Series A$3M
#3
Series B · Houston, Texas · founded 2003 · 34 employees$38.6Mraised▾
Provider of a platform for HVAC membership program management and growth. The platform offers tools for contractors to increase membership signups and improve customer retention. It connects HVAC systems with smart sensors and cloud monitoring to prevent breakdowns. The platform helps contractors reduce operational costs and build sustainable revenue streams. It also provides homeowners with scheduling, credits, reminders, and video chat.
- Mar 2026Series B$4M
- Sep 2025Series B$3.8M
- Apr 2025Series B$3M
- Dec 2024Series B—
#4
Seed · Houston, Texas · founded 2022$5.9Mraised▾
Provider of energy efficient HVAC systems. It provides a device that connects to an existing AC rooftop unit by using Helix MICRA filters and liquid desiccants which pre-dehumidifies supply air, dropping the load on the existing unit and lowering power needs.
- Mar 2026Seed$12M
- Jul 2024Seed$5.9M
- Sep 2023Grant (prize money)$274.9K
#5
Series C · Houston, Texas · founded 2015 · 8 employees$29Mraised▾
Provider of pumped hydro based energy storage system. It is developing a grid scale energy storage system by pumping in water in depleted oil wells. The water injection is done under high pressure to pressurize the stone bed which in turn later would be released to run turbines by ejecting the water from the well. As the rock is compressed, the energy is stored. Opening the well allows the pressurized water to be released to spin a turbine to create energy.
- Feb 2025Grant (prize money)$1.2M
- May 2024Series C$10M
- Nov 2022Grant (prize money)$10M
- Jun 2020Series B$10M
#6
Funding Raised · Houston, Texas · founded 1991 · 6 employees$12.6Mraised▾
Provider of cloud platform for enterprise-wide carbon and methane emissions management. The platform centralizes emissions data across scopes one, two, and three. It offers tools for real-time insights, regulatory reporting, and enterprise growth. The platform supports source-level measurements, emission factor creation, and inventory reconciliation.
- May 2025Grant (prize money)$4.2M
- Jan 2025Grant (prize money)$4.2M
- Jan 2025Grant (prize money)$4.2M
#7
Series A · Houston, Texas · founded 2019 · 4 employees$14.5Mraised▾
Developer of medicines for cancer, autoimmune, and infectious diseases. The company's lead antibody, ASY-77A, enhances antigen presentation by targeting the extracellular form of heat shock protein. Another candidate ASY-77A has produced complete regression of various cancer types including solid tumors such as breast and colon cancer, and blood-related cancers like multiple myeloma.
- Apr 2025Grant (prize money)$241.4K
- Apr 2022Grant (prize money)$246.5K
- Mar 2021Series A$14.5M
#8
Series A · Houston, Texas · founded 2020$41.6Mraised▾
Developer of mobile biochar production technology. This technology converts agricultural crop residue into biochar, a stable form of carbon, directly in the field. The process utilizes natural thermal processes and precision automation, improving soil health and permanently sequestering carbon. The mobile nature of the solution reduces transportation costs and environmental impact associated with traditional centralized biochar production methods. The technology incorporates remote sensing and advanced analytics to optimize efficiency and effectiveness.
- Jul 2024Series A$21.5M
- Oct 2023Series A$20M
- Jul 2023Grant (prize money)$200K
- Mar 2021Seed—
#9
Funding Raised · Houston, Texas · founded 2004 · 17 employees$36Mraised▾
Developer of direct air capture technology and geologic sequestration projects. It focuses on removing carbon dioxide from the atmosphere and storing it securely. The company develops large-scale direct air capture facilities. It also creates sequestration hubs for industrial facilities seeking carbon storage solutions.
- Oct 2024Grant (prize money)$36M
#10
Funding Raised · Houston, Texas · founded 2012 · 7 employees$11.3Mraised▾
Recycling rare earth elements from electronic waste for a sustainable future. The company focuses on sustainably recycling NdFeB magnets to recover valuable rare earth elements (REEs) from electronic waste. They address the challenge of REE supply by offering a patented, low-waste recycling process that extracts rare earths from discarded magnets found in electronics and clean energy technologies. This creates a dependable, renewable, and secure domestic source of REEs, reducing reliance on foreign sources and minimizing environmental impact. The final product is sold to original electronic manufacturers (OEMs) for creating new NdFeB magnets, promoting a circular economy and supporting sustainable end-of-life processes. This innovative approach turns waste into a valuable resource, contributing to a more sustainable and secure supply chain for critical materials.
- Jan 2025Grant (prize money)$5.1M
- Jan 2025Grant (prize money)$5.1M
- Apr 2019Grant (prize money)$898.5K
- Dec 2015Grant (prize money)$150K
#11
Series A · Houston, Texas · founded 2004 · 9 employees$12Mraised▾
Developer of immunotherapies to treat cancer. The company's lead immunotherapy, MEM-288, is to treat patients with advanced cancers including lung, breast, pancreatic, and prostate cancers. Other candidates include MEM 40 to treat COVID-19.
- Nov 2024Series A$950K
- Jun 2023Series A$625K
- Dec 2021Series A$9.8M
- Jul 2020Seed$575K
#12
Solugen 🦄Series D · Houston, Texas · founded 2016 · 99 employees$636.9Mraised▾
Developer of industrial solutions for oil and gas, fuels, and defense. The company’s platform technology offers efficient processes and sustainable feedstocks. It provides solutions for water treatment, cleaning, agriculture, concrete, and personal care. The company utilizes engineered enzymes and metal catalysts in its manufacturing processes.
- Nov 2022Series D$200M
- Sep 2021Series C$357M
- Jul 2020Series B$30.1M
- May 2019Series B$32M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Sustainability Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
What Houston researches in climate adaptation
Houston institutions, led by University of Houston, research flood risk and water management with an optimistic tone (mean stance 0.17), dominated by advancements in climate-health adaptation since 2020.
- University of Houston11
- Houston Community College System2
- Sam Houston State University2
- Houston Methodist1
Common questions
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.